I am having my coffee and listening to this wonderful rendition of Michael Jackson's 'Human Nature' played by John Mayer and thinking about the sensibilities of the vocal lines which were beautifully interpreted with the guitar.
Have you ever tried to imitate the vocal lines of famous songs with your guitar? I am thinking especially about very sensitive songs, for example played by the great divas - they have a lot of little articulation tricks which will work wonders for your hands and phrasing